Years after deadly attacks, 9/11 museum opens

Thirteen years after the deadly terrorist attack on American soil, a museum commemorating the horrifying incident that killed nearly 3,000 has opened to the public.

The museum opening comes a week after family members of the victims and rescue workers were first allowed in to view the site.

The museum includes 10,000 artifacts—startling visuals like well-worn staircases that workers ran down to escape the falling building, crushed ambulances and fire-trucks—as well as 23,000 still images and an archive of more than 500 hours, according to the New York Post.

The museum normally costs $24, but it was free on the first day to the first 7,000 who requested tickets online ahead of the grand opening.

Survivors and family members of the victims can enter the museum free of charge.